Exhaust tube structure for electron discharge tubes



1949- L. THIBIEROZ 7 EXHAUST TUBE STRUCTURE FOR ELECTRON DISCHARGE "TUBES Filed Aug. 9, 1946 Fig-2 m1 3 all 2 fig-S LA UKENT TH/B/E 2 dz tiire.

fs'idein'thenricr edim tron 'liis'chafge' tubes and cons V Fig. 4b i's la, enters:

" atiOritind eubsequent settlin 10f ti the use o 'c'est1y niaten "portion to the time Patented Aug. 16, 1949 mcn'niscnnnen TUBE sTRUjcfitUItE icit-Emca 'l murent :Thibiemz, QParis, g'Fr-ance, a'seig'n'or 1-10 ESQQ QE F-mncaim Radio Electrique, Va. corporation oLFr-ance v mpacte "ing' and sewing-eff ep reticni'cfsuch tubes. I

netherjebjee (if my inventionfisitb 1previde en'imprcve me *0? 6r maeditmg theexm ust time 7 in the fme'iififa re '1 jelectrljn' discharge [tubes fer reducing: the 'ccs gd 0mg elecructicn e'f' elechniciiie full'y in f's tructureinustrateflii Skilled fielder: its 'cio'st.

' 'diticnremain'in'jg alike, -utgpene the 'ispeed the system or ctro, "is""'eeheienet m sm n- 'of time iiienufec- "intention "i'ejisthe 'sb-cellle'iijeihaiist' tube. fiF'or, actually, in "the etate of the presentpract'rcesfiit"isfnecessarly to have an exhaust tube of only'a' few'milllm e s of interior diameter, 's'o' that it T is pcssible to'ciit it off and close it "when the" exhaustin operaticnis "ended; for it i kncwn that it not possible to cut "ofi an exhaust "tube io'f a' toe Sg'ieat uiameter without being subjectftothe cl-ame'er'of cracking.

'For' a groiip of vacucm pumps 6f agiv'en' power, the speed "6f the'op'er'ati'en "o'i exheusticn' is "thus limited'by thenfimfsSildleVHliie 'OFthe diameter of this exhaust tubfe. The present inventiqn"ellowsjtheiise"cf ex- "heust tubes of great ;diameter,whijch maybebf several centimeters. The"speed with "which the "vacuum j is "obtained "*is' thus fconside'ra bly increased. The arrangementresults-thenin every "important reduction ofjth'e time "necessai'y fd evacuatingth'e' valvett'nd an increase (if the capacity oiproducticn cifdischaige'tiibesund Ia, reduction in the ccst'priceitheredf, I r By way of non limitative eXeniplwFig. 1"Sh'6ws "onefform of my inventicn illustrating "the brinciple of operation by which largediameterieiihaust ".25 tubes maybe employed. L designates e; valveof a great power arranged for "an"exhaiuet'operagtion. Theconnecticn" between"the"ve;lve'aniiTthepumping system P'is "efiectednearthevailve by aniex- "haust "tube majd'e TdttWofdohdhitS, one 'of which isinterior'to'theother. I'he'setwc-c'onduits"may "be made of "glass or anybtherin'siilating' materiaLthe interioi 'co'nciuit may be""ma;de also o'fa metallic"alloy whichit is poesilcleto'sdlder' to the r glass.

"The interior conduit lnieyhev ee diatm'etercf s'everarcentimeters; it hearse collar :2 "on' which there isjj'fixed, through a "pivotal connection a, metallic alley, which is weld-able to itself 'or'to glass. The collar 2 is fastened ai'oun'd interior conduit l by screw-threaded boltnnd'inuticen- "necti'on l0. Theinterior conduit lteiminates in an annular "peripheralf'seat ielgainst "which disc "4 mayseet in a'vacuum-ti'ghtrmanner. This disc 4 may also be of glasewhen the conduit lis 'of a metallic ello'y which is welcl alble to glass. This disc is maintained in'the opempositionthrpugh the intervention of an external magnetic field,

i thesourceof' which not illn'sti'at'edbutthe'a'ction of which maybeexertediipcn agpiece yof where the disc is notitself 6f aFinXgnetitYmate- 'make use of the same reference characters as in When the evacuation of the valve is ended, the disc 4 is applied in the closing position, through a magnetic action against the rim of the interior conduit l which rim has been previously suit-ably prepared.

It is then possible, for instance by means of a high frequency oven with localized field, to effect the welding of this disc 4 on to the end of the interior conduit l and thus hermetically close this conduit 1 in an absolutely tight mamier.

During this operation it is possible, if necessary,

to cool the conduit 1.

Conduit 6 is disconnecti-ble or severable with respect to conduit 1 and may be broken away from tube 1, that is, after the exhausting and sealing operation, it is possible to cut off the exterior conunderstood that no limitations upon my invention are intended other than may be imposed by the scope of the appended claims.

What I claim ,is:

1. An electron discharge device comprising a vessel terminating in an exhaust tube of nonmagnetic material, an annular peripheral seat on the terminus of said exhaust tube, a disc of non-magnetic material pivotally mounted with respect to said exhaust tube and operative to hingedly cover or uncover the end of said exhaust tube, a second tube of insulation material surrounding"the-aforesaid tube and severably con- -nected thereto and forming a connection for duit 6 for separating it from the Valve. If this conduit 8 has been fixed to the exhaust tube or Fig. 1, no other explanation is needed. The embodiment of Fig. 3 permits, for instance, of outgassing disc 4, by means of a high frequency oven having a horizontal axis, a few seconds before turning it down against the interior conduit i.

Figs. 4a and 4b show longitudinal and transverse sections of a detail of one of the embodinnents of the exhaust tube 5 where the exhaust tube I extends in a vertically upward direction. At S there is indicated the high frequency oven.

In the various embodiments of my invention, the disc 4, instead of being fixed by collar 2 and axis 3, may also be maintained and guided in any other manner.

My invention also permits of opening a valve while shielding it from the air and effecting successively the same operations in the reverse order of that previously described.

To this end, the exterior conduit 5 may be for instance re-formed by soldering, by means of a 7 high frequency oven, a glass or insulating tubing to the exhaust tube I of the valve; then this exterior conduit ii may be connected to the system of vacuum pumps. When the vacuum in this I conduit is high enough, the connection between disc 4 and the interior conduit I will be unsoldered by means of a high frequency oven analogous to the oven 8 hereinbefore referred to. Theopening of this disc and its maintenance in the open position is effected through the action of a magnetic field.

The invention may also be applied where several exhaust tubes for one valve are employed.

It is also applicable to rectifiers, oscillograph tubes, vacuum tubes, etc.

Finally, in a more general manner, my invention aims at achieving the assembling through soldering by means of a high frequency oven, at the interior of a chamber with non metallic walls, of two metallic parts, or of one part of While I have described my invention in certain of its preferred embodiments I realize that modifications may be "made and I desire that it be establishing a vacuum through said tubes in said vessel and magnetic mean carried by said disc and responsive to the control of an external magnetic field for effecting the closing or opening of the end of said exhaust tube, the material of said disc being fusible with the peripheral seat on said terminus under conditions of induced high temperatures. I

2. An electron discharge device comprising a vessel terminating in an'exhaust tube of nonmagnetic material, an annular peripheral seat on the terminus of said exhaust tube, a disc of non-magnetic material, a collar member enveloping said exhaust tube, a bracket member extending therefrorma hinge member extending from said disc of non-magnetic material, pin means for pivotally connecting said hinge member with said bracket whereby said disc may move to either of two limiting positions for covering or uncovering the end of said exhaust tube, a second tube of insulation material surrounding the aforesaid tube, said collar and said pivotally mounted disc, and forming a connection for'establishing a vacuum through said tubes in said vessel, and magnetic means carried by said disc and responsive to thecontrol of an external magnetic field for efiecting 'the closing or opening of the end of said exhaust tube, the material of said disc being fusible withthe peripheral seat on said terminus under conditions .of induced high temperatures.

3. An electron discharge device comprising a vessel terminating in'an exhaust tube of nonmagnetic inaterial, an annular peripheral seat on the terminus of i said exhaust tube, a disc of nonmagneticmaterial, afcollar member enveloping said exhaust tube, a bracket member extending .therefrom, a hinge member extending from said "disc of insulation material, pin means for pivot- .ally connecting said hinge member with said bracket whereby said disc may move to either of twolimiting positions for covering or uncovering Y uum through said tubes in said vessel, magnetic means carried by said disc and responsive to the control of an external magnetic field for effecting the closing or opening of the end of said exhaust tube, the material of said disc being fusible with n the peripheral seat on said terminus under conditions of induced high temperatures, and a metallic and non-magnetic connecting means between said second tube of insulation material and said exhaust tube for facilitating removal of said second tube from said exhaust tube when said disc is sealed in a position covering the end of said exhaust tube.

1 '4. An electron discharge device comprising a vessel terminatingin an exhaust tube of 11011.

magnetic material, an annular peripheral seat on the terminus of said exhaust tube, a disc of nonmagnetic material pivotally mounted with respect to said exhaust tube and operative to hingedly cover or uncover the end of said exhaust tube, a second tube of insulation material surrounding the aforesaid tube and severably connected thereto and forming a connection for establishing a vacuum through said tubes in said vessel and magnetic means carried by said disc and responsive to the control of an external magnetic field for effecting the closing or opening of the end of said exhaust tube, the material of said disc being fusible with the peripheral seat on said terminus under conditions of induced high temperatures, the plane of said disc when in a position covering the end of said exhaust tube being substantially normal to the axis of said vessel.

5. An electron discharge device comprising a vessel terminating in an exhaust tube of nonmagnetic material, an annular peripheral seat on the terminus of said exhaust tube, a disc of nonmagnetic material pivotally mounted with respect to said exhaust tube and operative to hingedly cover or uncover the end of said exhaust tube, a second tube of insulation material surrounding the aforesaid tube and severably connected thereto and forming a connection for establishing a vacuum through said tubes in said vessel and magnetic means carried by said disc and responsive to the control of an external magnetic field for effecting the closing or opening of the end of said exhaust tube, the material of said disc being fusible with the peripheral seat on said terminus under conditions of induced high temperatures, the plane of said disc when in a position covering the end of said exhaust tube extending in a direction substantially parallel to the axis of said vessel.

LAURENT THIBIEROZ.

, REFERENCES CITED UNITED STATES PATENTS Name Date Ronci Aug. 2, 1938 Number 

